Nut-lock.



J. PERRIE.

NUT LOCK. APPLICATION FILED SEPTQIB, 1907.

Patented May 11, 1909.

7 I u EITIE lg m A EIIHEH impracticalide, and their ell JOHN PERRIE, OF

f) t T EJ T l WT .fL isis li Um .ilf ri f/1m.

CHI CA G O. ILLIN 01H.

Specification of Letters Patent.

Patented May 11, 1609.

Application filed September 18, 1937. Serial No. 393,436.

I l e t '4 A 1.0 all whom a may comer-m.

Be it knot. n that i, JOHN PER'RIE, citizen the county ment inNut-Locks, of which the follo -v ing is a full, clear, concise, andexact descrip reference being bad to the accompa' (lra tion,

. ngs, forming a part of this spcclficatmn.

' f this kind.

"fhere are a great number of nut locks on the market, but they are a lmore or less icicncy is not l he nut lock practicable, and involvesseveral features and points of construction ehiol'i make its lock'figand lasting.

1 shall describe my invention by 'eferencc to the accompanying drawings,in which Figure 1 is a side elevation of a bolt in ac tual service iththe not lock applied; Fig. 2 big. 3 18 a side vlen' an, end View of Fig.1 of the locking nut; at is a plan View of the inside of the look nutFig. 5 is a sectional View taken on lino of Fig. 4. Fig. 6 is asectional viev. taken on line 66 of Fig. 4; Fig. 7 is a perspective Viewof the lock nut, and Fig. 8 is a sectional vies taken on line 88 of Fig.2.

The lock nut comprises a polygonal, preferably square, body part 1,having therethrough the threaded central opening 2 for receiving thethreads of the bolt whose nut it is desired to lock. Extending from eachcorner of one face of the body part is a foot or lug 3, these feet beingcomparatively heavy and stocky. The feet are preferably formed byforming the cylindrical grooves 4 which extend from the edges of the nutto the central opening, as best shown in Figs. and 7. These cylindricalgrooves leave the edge at the base of the feet well rounded and therefore give the feet great strength. The inner edge 5 of the feet is alsoslightly rounded. The sides of the lock nut are also preferably taperedslightly in the direction of the feet, as best shown in Figs. 3, 5 and7.

The method of application is shown in Figs. 1, 2 and S. The bolt 5 isshown as utilized for clamping the members 1 and m together. The nut nis drawn up as tightly as desired on the bolt and a locking nut isryention relates to nut locks, its obi ng to ,)1'OJl(l a more efficientdevice of my invention is simple and j qualities and efficiency verygreat th applied to the threads, the feet engaging le nut. Vshen the wrnob is soplied to the looking out and great turning stress exertedthereon, the feet slide over the fat-1 of the nut. T...e body part ofthe nut is worked. up on the threads and becomes iwed or dished, asshown, the dianurter of the nut threads at the outere l becoming 1reduced, and therefore cans cry 9" l iping and clamping action on timeflhrfiiir of the bolt, without in any way harming the threads. Owing tothe bowm or dishi the body part, the feet are spree d outwa l ly, theirrounded inner ed, finally e i the nut '22 and securing very firm auo inggrip and hold thereon, the outer or I;

the feet being then slightly away from the l nut face.

The amount of bevel come lua-rizontal after the lock nut has bee.

drawn up to clamp the nut. il' ith this bevel arrangement, the lockingnut can be most efficiently applied; the bevel being inwardly toward.the main nut "12 the wrench will be held on the locking nut and will notslip therefrom, and when the locking nut is to be finally drawn home,its outer faces are practically parallel and give the best grip for thewrench. The. locking nut is preferably made one size smaller than themain nut, but it 5 may be of the same shape and size as the j main nut,as shown, and in this case, the l bevel performs another function. Whenthe locking nut is first applied, the ends of the Q feet are within theedges of the main nut, but after the locking nut has been drawi'i home,the feet spread until the sides of the lock nut are parallel with thesides of the main nut, thus giving a very neat appearance. Where theengagement is between the ends 5 of the lock nut and the main nut, theresistance to unlocking is very much greater than if the entire endfaces of the feet engage with the main nut. The outer part of the feetends being slightly away from the main nut, the tendency will be for thefeet to return in.- g wardly to bring the entire surfaces of the feetinto contact with the main nut, and thus there is a constant forceexerted against the main features are the provision of substantiallyheavy feet extending from a comparatively heavy body part, with theedges Well rounded, and the outer edges of the feet heing also slightlyrounded. These features, together With the bevel arrangement of thesides of the nut, produce a d vice Which has been found to heexceedingly Whose ellieiency and clamping lasting.

I claim as new and desire to secure by Letters latentz 1 A lock nutcomprisiia" part having central openii continuous and uuhro cessestrained in the bean as to leave hearing; feet hearing face, such. soforce practically the whole c the outer thread of the nut agoualu-resclosed thread when the nut l orced into 1 2. Alock nut comprising" a go"part havi g a central open ng ,1 continuous and uuhroken turn lygonalfaces no Lolly center 7 "1e hearface, the h ri gr face of the nut soconforine-tl as to soil n he nut an hrin opposite pol onal laces intopram-cticelly allel planes v. hen the nut is forced into clai upinengagement '"onal her Jvidcu u the poo. A look nut comprising apolygonal hody part having a central opening provided with continuousand unbrol-ze threading, two

eflicient and l l l rounded grooves, each somewhat Wider than thecentral opening, formed in the hearing face from side to side and atright angles to each other, such grooves so formed as to leave hearingfeet at the four corners of the hearing face, such feet having archedconnections to the body of the nut, such arched C9D? nections serving tocompress practically the Whole circun'ilei ence of the outer thread ofthe nut When the nut is forced ii to clamping engagement 4t, A lock nutcomprising a polygonal body part ha: ing; a central pening provided withcontinuous and unbroken threading, recesses red in the hearing face ofthe nut so as to searing eet at the corners or the bearl e ce, suchrecesses so formed as to force vtically the whole circumference of thethread of the nut against the inclosed Wire; the nut is forced intoclamping inent, the polygonal faces of the nut ally convergi toward thehearing face lace ol the nut so conformed e nut and bring oppositepourine l inar faces into practically parallel planes w wen the nut isforced into clamping engagement.

ln Witness whereof, I hereunto subscribe my name this 14th day of Sept.A. 1)., 1907.

JOHN PERRIE.

Witnesses:

Rona. W. WJLSQN, ANDREW J. CONLIN.

